diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index 4dddf926..89d2593c 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.3.7
+current_version = 0.3.8-dev
 commit = True
 tag = False
 parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)(?:-(?P<release>[0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*))?(?:\+(?P<build>[0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*))?
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 027c039d..d03acf2f 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -27,7 +27,7 @@
 author = "Charles Tapley Hoyt"
 
 # The full version, including alpha/beta/rc tags.
-release = "0.3.7"
+release = "0.3.8-dev"
 
 # The short X.Y version.
 parsed_version = re.match(
diff --git a/setup.cfg b/setup.cfg
index e1f2b3c4..81883d02 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -4,7 +4,7 @@
 # Configuring setup()
 [metadata]
 name = biomappings
-version = 0.3.7
+version = 0.3.8-dev
 description = Curated and predicted mappings between biomedical identifiers in different namespaces
 long_description = file: README.md
 long_description_content_type = text/markdown